fix water/reflection/camera surface rendering

[xonotic/darkplaces.git] / sys_shared.c

diff --git a/sys_shared.c b/sys_shared.c
index 43fda3c9f1fe12151619f4849cc070318e083240..3b83a49888e5cc2af639b12f90c6522afcff0250 100644 (file)
--- a/sys_shared.c
+++ b/sys_shared.c
@@ -212,15 +212,18 @@ void* Sys_GetProcAddress (dllhandle_t handle, const char* name)
 # define HAVE_USLEEP 1
 #endif
 
-cvar_t sys_debugsleep = {0, "sys_debugsleep", "0", "write requested and attained sleep times to standard output, to be used with gnuplot"};
+// this one is referenced elsewhere
 cvar_t sys_usenoclockbutbenchmark = {CVAR_SAVE, "sys_usenoclockbutbenchmark", "0", "don't use ANY real timing, and simulate a clock (for benchmarking); the game then runs as fast as possible. Run a QC mod with bots that does some stuff, then does a quit at the end, to benchmark a server. NEVER do this on a public server."};
-cvar_t sys_usesdlgetticks = {CVAR_SAVE, "sys_usesdlgetticks", "0", "use SDL_GetTicks() timer (less accurate, for debugging)"};
-cvar_t sys_usesdldelay = {CVAR_SAVE, "sys_usesdldelay", "0", "use SDL_Delay() (less accurate, for debugging)"};
+
+// these are not
+static cvar_t sys_debugsleep = {0, "sys_debugsleep", "0", "write requested and attained sleep times to standard output, to be used with gnuplot"};
+static cvar_t sys_usesdlgetticks = {CVAR_SAVE, "sys_usesdlgetticks", "0", "use SDL_GetTicks() timer (less accurate, for debugging)"};
+static cvar_t sys_usesdldelay = {CVAR_SAVE, "sys_usesdldelay", "0", "use SDL_Delay() (less accurate, for debugging)"};
 #if HAVE_QUERYPERFORMANCECOUNTER
-cvar_t sys_usequeryperformancecounter = {CVAR_SAVE, "sys_usequeryperformancecounter", "0", "use windows QueryPerformanceCounter timer (which has issues on multicore/multiprocessor machines and processors which are designed to conserve power) for timing rather than timeGetTime function (which has issues on some motherboards)"};
+static cvar_t sys_usequeryperformancecounter = {CVAR_SAVE, "sys_usequeryperformancecounter", "0", "use windows QueryPerformanceCounter timer (which has issues on multicore/multiprocessor machines and processors which are designed to conserve power) for timing rather than timeGetTime function (which has issues on some motherboards)"};
 #endif
 #if HAVE_CLOCKGETTIME
-cvar_t sys_useclockgettime = {CVAR_SAVE, "sys_useclockgettime", "0", "use POSIX clock_gettime function (which has issues if the system clock speed is far off, as it can't get fixed by NTP) for timing rather than gettimeofday (which has issues if the system time is stepped by ntpdate, or apparently on some Xen installations)"};
+static cvar_t sys_useclockgettime = {CVAR_SAVE, "sys_useclockgettime", "0", "use POSIX clock_gettime function (which has issues if the system clock speed is far off, as it can't get fixed by NTP) for timing rather than gettimeofday (which has issues if the system time is stepped by ntpdate, or apparently on some Xen installations)"};
 #endif
 
 static unsigned long benchmark_time;
@@ -374,7 +377,7 @@ double Sys_DoubleTime(void)
 
 void Sys_Sleep(int microseconds)
 {
-       double t;
+       double t = 0;
        if(sys_usenoclockbutbenchmark.integer)
        {
                benchmark_time += microseconds;
@@ -418,3 +421,57 @@ void Sys_Sleep(int microseconds)
                printf("%d %d # debugsleep\n", microseconds, (unsigned int)(t * 1000000));
        }
 }
+
+const char *Sys_FindInPATH(const char *name, char namesep, const char *PATH, char pathsep, char *buf, size_t bufsize)
+{
+       const char *p = PATH;
+       const char *q;
+       if(p && name)
+       {
+               while((q = strchr(p, ':')))
+               {
+                       dpsnprintf(buf, bufsize, "%.*s%c%s", (int)(q-p), p, namesep, name);
+                       if(FS_SysFileExists(buf))
+                               return buf;
+                       p = q + 1;
+               }
+               if(!q) // none found - try the last item
+               {
+                       dpsnprintf(buf, bufsize, "%s%c%s", p, namesep, name);
+                       if(FS_SysFileExists(buf))
+                               return buf;
+               }
+       }
+       return name;
+}
+
+const char *Sys_FindExecutableName(void)
+{
+#if defined(WIN32)
+       return com_argv[0];
+#else
+       static char exenamebuf[MAX_OSPATH+1];
+       ssize_t n = -1;
+#if defined(__FreeBSD__)
+       n = readlink("/proc/curproc/file", exenamebuf, sizeof(exenamebuf)-1);
+#elif defined(__linux__)
+       n = readlink("/proc/self/exe", exenamebuf, sizeof(exenamebuf)-1);
+#endif
+       if(n > 0 && (size_t)(n) < sizeof(exenamebuf))
+       {
+               exenamebuf[n] = 0;
+               return exenamebuf;
+       }
+       if(strchr(com_argv[0], '/'))
+               return com_argv[0]; // possibly a relative path
+       else
+               return Sys_FindInPATH(com_argv[0], '/', getenv("PATH"), ':', exenamebuf, sizeof(exenamebuf));
+#endif
+}
+
+void Sys_ProvideSelfFD(void)
+{
+       if(com_selffd != -1)
+               return;
+       com_selffd = FS_SysOpenFD(Sys_FindExecutableName(), "rb", false);
+}